Question

A chemist has a container of 12% peroxide solution and a container of 20% peroxide solution. She needs to mix the two solutions to create 100 mL of a 14% solution. If x represents the amount of 12% peroxide solution and y represents the amount of 20% peroxide solution she needs, which matrix equation can determine the amount of each solution she needs to make the 14% solution?

Answer 1

Its B

Explanation:

Answer 2

`0.12x+0.2y=14,\:x+y=100\quad :\quad x=75,\:y=25`

Explanation:

.12x + .2y = 14

x + y = 100